Atopy is a predisposition toward developing certain allergic hypersensitivity reactions. Atopy may have a hereditary component, although contact with the allergen or irritant must occur before the hypersensitivity reaction can develop.
As of 2012, 63.9 percent of players playing in Major League Baseball are white. There is no way of telling the exact number due to the number of players.
A person who has been banned from Major League Baseball is barred from: employment with MLB, one of its affiliated minor leagues, or any Major League or Minor League Club, whether as a player, coach, or manager, or in the front office;